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Selection of Antagonistic Microorganisms against Plant Pathogens from Eco-friendly Formulations
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 Title & Authors
Selection of Antagonistic Microorganisms against Plant Pathogens from Eco-friendly Formulations
Gang, Guen-Hye; Cha, Jae-Yul; Heo, Bit-Na; Yi, Og-Sun; Lee, Yong-Bok; Kwak, Youn-Sig;
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 Abstract
BACKGROUND: Some microorganisms extant in nature have ability to suppress various plant pathogens, and also can promote plant growth. Thus microorganisms are such great source of antimicrobial agents to develop antagonistic microorganism production and eco-friendly crop management. We isolated the microorganisms in various eco-friendly formulations. The suppressive abilities against plant pathogens have been characterized in vitro level. METHODS AND RESULTS: The indigenous microorganisms have been isolated from Cooked rice, Black sugar, Rice Bran, and Red clay using dilution plating method. Population of bacteria and fungi were above 107 in the all formulations. We isolated and pure cultured the microorganisms based on morphological characteristics. Three major plant pathogens (Fusarium oxysporum, Rhizoctonia solani, Phytophthora capsici) have been used to select antagonistic microorganisms. Total 20 bacteria and 9 fungi showed the pathogen growth suppression ability in vitro condition. The selected microorganisms were identified by ITS sequence similarity. CONCLUSION: All tested eco-friendly formulations contained high-density of the microorganisms. Among the isolated microorganisms, Bacillus spp. and Streptomyces spp. showed the most effective antifungal activity against the plant pathogens such as F. oxysporum, R. solani, and P. capsici. Among the selected fungi Trichoderma sp. demonstrated antifungal activity. Our results suggest that the currently adapted eco-friendly formulations might useful for sustain agricultural system.
 Keywords
Antagonistic microorganism;Black sugar;Cooked rice;Eco-friendly formulations;Red clay;Rice bran;
 Language
Korean
 Cited by
1.
미강제제 처리가 밭재배 고추의 생육, 이화학적 특성, 미생물 군집 및 시들음병 방제에 미치는 영향,이정한;강근혜;박경미;이용복;곽연식;

농업생명과학연구, 2014. vol.48. 1, pp.41-48 crossref(new window)
2.
친환경제제 처리에 의한 토양미생물 군집 변화 및 벼잎집무늬마름병 (Rhizoctonia solani) 억제효과,강근혜;이정한;박경미;이용복;곽연식;

농업생명과학연구, 2014. vol.48. 4, pp.47-53 crossref(new window)
3.
반유한 직립형 동부의 하우스 파종기 이동에 따른 농업적 형질의 변화,김동관;손동모;이경동;임요섭;정정성;

한국작물학회지, 2014. vol.59. 4, pp.470-476 crossref(new window)
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